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Hey my e38 is at 207k and im getting the torque converter shudder, every mechanic is telling me to leave my tranny alone, anybody changed there fluid and filter with similar mileage, and how did it turn out?

Research methods of partial drain / partial fills- this seems to be the method least likely to cause the transmission to go into "shock", for lack of a better technical description. The filling temp is a narrow range- it's stamped on the bottom of the unit. ALWAYS check to ensure the fill port can be opened PRIOR to loosening drain port. I believe the plug is a 14mm hex. Hookup to DIS to check operating temp is within range, or best guess as "warm" by touch. Fill with a new garden sprayer. Be sure to have vehicle level. After a few partial drain / fills- I'd drop the pan and change the filter with FILTRAN oem ONLY- use new gasket.

Do more research, read more before jumping in-- this is not fun. Transmission fluid STINKS, its MESSY, and this task might or might not cure your problem- and can even make it worse-- but at this point, you have little to lose, right?

Good luck!

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It's not what you buy, it's what you build- UnknownEN90283 - Stabled for HG repair
DH06247 - Running like a champ